The Effect of using Ash Residues of Olive Fruits on the Properties of Cement Mortar

This research aims at studying the effect of the use of the burnt olive oil waste ash (OWA) resulting from olive plant wastes as a partial cement replacement (5%, 7% and 10%) on the properties of cement mortar. The ash burning temperature varies as 600, 700, 800 and 900˚C, and time as 6, 7, 8 hours. The mortar cured in air and water were prepared with 0.42 w/c ratio and sand to water ratio of 1.5 by mass. The results showed that the 600˚C was efficient in terms of contribution to strength, specific gravity while 7% cement-OWA replacement mixture was found to favour flowability of the mortar compared to 5 and 10% substitution. Extending OWA burning time temperature to 900˚C and 8hrs increased its porosity and water absorption of the resulting mortar. The OWA slowed down the setting time which made it suitable in the hot weather concreting practice.